Lenovo ThinkCentre M91p Hardware Maintenance Manual - Page 70

Error code 0210 0135 0211 0164 1762 0662 POST error message CMOS Battery Failure Keyboard error or no keyboard present Press TAB to show POST screen Main processor Installed memory: SATA 0: Stuck key Fan failure Keyboard not found Memory size decreased Configuration change has occurred Configuration change has occurred Description/Action The CMOS battery is no longer functional. Replace the battery. Cannot initialize the keyboard. Make sure the keyboard is correctly connected to the computer and that no keys are held pressed during the POST. To purposely configure the computer without a keyboard, set the error halt condition in the Setup Utility program to HALT ON ALL, BUT KEYBOARD. The BIOS then ignores the missing keyboard during the POST. Pressing the TAB key permits you to toggle between the default POST screen and a custom POST display screen. The main microprocessor information is displayed on the POST screen. The total size of installed memory modules is displayed on the POST screen. The hard disk drive information is displayed on the POST screen. When a key is kept pressed for a long time, the error message will be displayed during the POST. The system might be overheating. Press F10 to exit. Note: If the problem is caused by the microprocessor fan, pressing F10 will not solve the problem. When there is no keyboard detected, the error message will be displayed. Press F10 to exit. This error message is displayed when a hard disk drive or optical drive change has been made. Press F10 to exit. This error message is displayed when a floppy drive change has been made. Press F10 to exit. 64 ThinkCentre Hardware Maintenance Manual